EP0659506B1 - Sliding gate closure - Google Patents

Sliding gate closure Download PDF

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Publication number
EP0659506B1
EP0659506B1 EP94120342A EP94120342A EP0659506B1 EP 0659506 B1 EP0659506 B1 EP 0659506B1 EP 94120342 A EP94120342 A EP 94120342A EP 94120342 A EP94120342 A EP 94120342A EP 0659506 B1 EP0659506 B1 EP 0659506B1
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EP
European Patent Office
Prior art keywords
flange
underside
gate plate
gate
slide plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94120342A
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German (de)
French (fr)
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EP0659506A1 (en
Inventor
Wilfried Dahmen
Heinz Dieter Hannes
Rolf Himmler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zimmermann and Jansen GmbH
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Zimmermann and Jansen GmbH
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Publication date
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Publication of EP0659506A1 publication Critical patent/EP0659506A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/28—Plates therefor

Definitions

  • the invention relates to a slide closure for opening and closing the outlet channel of a casting vessel for metallic melts according to the preamble of claim 1.
  • a slide closure was proposed, as shown in Fig. 1, left half.
  • This slide closure comprises a head plate arranged at the bottom of a casting vessel for metallic melts and a slide plate which can be displaced relative thereto.
  • a pouring spout is formed on the underside of the slide plate.
  • the pouring spout comprises a tube section which is formed in one piece with the flange.
  • a passage is provided in the tube section, through which the metallic melt can emerge when the slide closure is open.
  • the flange and the pipe section consist of different mortar-containing material, with a mixing of the same occurring in the transition area of the two materials. This mixture that occurs during the production of the pouring spout is referred to as "spinel formation”.
  • the grain size of the granular constituents contained in the mortar is limited by the fact that the mortar should also fill a gap which is formed between a steel frame surrounding the flange and the slide plate. This unnecessarily restricts the selection or nature of the materials for the pouring spout or the pipe section. Furthermore, when using a single type of mortar for the flange and pipe section, an unnecessarily large quantity of expensive casting compound is required, the quality of which is determined by that for the pipe section which is subject to particularly high wear.
  • the object of the present invention is to further develop the slide closure mentioned at the outset in such a way that the functional reliability is ensured over a long period of use with inexpensive manufacture.
  • the slide closure according to the invention is characterized in that the tube section, like the flange, is formed on the underside of the slide plate, and that the pipe section has a steel jacket which extends through the steel frame of the flange to the underside of the slide plate.
  • the latter measure ensures that the steel jacket is supported on the underside of the slide plate.
  • This provides the pipe section with additional support on the slide plate via the steel jacket.
  • This additional support can absorb transverse forces acting on the pipe section. These transverse forces are not transmitted to the flange, so that there is no fear of cracking in the area between the flange and the pipe section.
  • different materials can also be used for the flange and pipe section.
  • the separation of the pipe section on the one hand and the flange on the other hand means that there is no longer any risk of accidental crack formation between these two areas.
  • a material can be used for the flange, which is used to embed the slide plate and to support the slide plate against thermodynamic spring elements, which materially binds to the slide plate and is mechanically highly resilient.
  • the pipe section of the pouring spout should be suitable for direct contact with the metallic melt and insulate as well as possible.
  • the expensive casting compound that surrounds the pouring spout in the pouring spout is only used for the pipe section. Less expensive material can be used for the flange.
  • the design according to the invention ensures the cost-effective production of a functionally reliable slide closure with a long service life.
  • Figure 1 shows the longitudinal sections of two embodiments of a slide closure.
  • a slide closure according to the prior art is shown and in the right half an embodiment of a slide closure according to the invention.
  • the slide closure is arranged on the bottom of a casting vessel, not shown, for metallic melts and is used to open and close an outlet channel. It comprises a head plate 12, which is arranged directly on the bottom of the casting vessel (not shown), and a slide plate 16 provided underneath it, on the underside of which a pouring spout 20 is formed.
  • the slide plate 16 is arranged in a known manner relative to the head plate 12. In the closed position, a passage 18 formed in the slide plate 16 is offset from a correspondingly large passage 14 in the head plate 12. In the fully open position, the two passages 14, 18 are aligned with one another so that the metallic melt can flow out of the casting vessel. As a rule, the slide plate 16 is assigned a hydraulic drive, which need not be explained in detail here, since these are known measures.
  • the pouring spout 20 is - as already stated above - molded or cast onto the underside of the slide plate 16 and comprises a tube section 26 defining an outflow channel and a flange 28 extending over the underside of the slide plate 16 and the lateral edges thereof.
  • the pouring channel defined by the pipe section 26 extends the one formed in the slide plate 16 Passage 18 and extends continuously from the slide plate 16 down to the lower end of the pouring spout 20. It consists of a refractory material, for example an Al 2 O 3 -containing casting compound, which is surrounded by a steel jacket 24.
  • the steel jacket 24 is supported at one end on the slide plate 16 and also extends to close to the lower end of the pouring spout 20.
  • the steel jacket 24 and, accordingly, also the pouring spout 20 has a conically tapering end section, which in a corresponding Opening of a shadow tube 34 arranged below it with an associated manipulator 36 can be inserted in a sealing manner.
  • the flange 28 surrounds the tube section 26 on the underside of the slide plate 16 and is surrounded by a steel frame 22, which in turn surrounds the steel jacket 24 of the tube section in the manner of a sleeve.
  • the steel frame 22 extends at a distance from the underside of the slide plate 16 starting from the pipe section 26 radially outwards and is bent upwards at the radially outer end (see reference number 44 in FIGS. 1 and 2), so that it at least for the slide plate 16 Part also borders on the side.
  • a narrow gap 40 is defined between the slide plate 16 and the upwardly bent edge of the steel frame 22.
  • the two elements are fixed to one another by a tack weld.
  • a cavity is accordingly formed for the production of the pouring spout 20, into which the flange mass is filled.
  • a mortar containing Al 2 0 3 can be used as the material for the flange.
  • the granular components of the material for the flange 28 have a grain size which is slightly smaller than the minimum width of the gap 40 between the lateral edges of the slide plate 16 and the upwardly bent edge 44 of the steel frame 22 the flange material can penetrate into the gap 40 and fill it. This creates a permanently firm connection between flange 28 or pouring spout 20 and slide plate 16, which also withstands the high mechanical forces which are exerted by flange spring 30 already mentioned between flange 28 and a support frame 32.
  • the spring elements 30 press the slide plate 16 tightly against the head plate 12 via the flange 28. This prevents metallic melt between the slide and head plate from penetrating outside or air inside into the outlet channel.
  • TDE thermodynamic elements
  • the materials of the tubular extension or tube section defining the outlet channel and of the flange merge into one another or are mixed with one another in the transition region. Because of the different coefficients of thermal expansion, uncontrolled cracking can then occur in this critical material area during operation of the slide closure (see reference number 38 in FIG. 1), so that the functionality of the slide closure 10 cannot be guaranteed.
  • the material for the tube section 26 can be selected independently of the material for the flange 28. Both materials are in the region of the flange 28 through the upper ring portion 42 of the Pipe section 26 surrounding steel jacket separated from each other. The defined delimitation of both materials creates a type of predetermined breaking point or expansion joint between flange 28 and pipe section 26. A random crack formation in the pouring spout 20 during operation of the slide closure is therefore not to be feared.
  • a mortar with a granular component whose grain size is larger than the grain size of the granular components of the material for the flange 28 can be selected for the pipe section 26.
  • Al 2 O 3 , MgO or similar casting compounds can be used as refractory materials.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Lock And Its Accessories (AREA)
  • Bag Frames (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Chutes (AREA)

Abstract

The invention relates to a sliding gate closure for opening and closing the outlet channel of a casting vessel for metallic melts. The sliding gate closure comprises a sliding gate plate (16) which can be displaced relative to a head plate (12) arranged on the bottom of the casting vessel and formed integrally on the underside of which is a casting nozzle (20) with a flange (28). The flange (28) extends across the underside and at least part of the lateral edge of the sliding gate plate (16) and is surrounded by a steel frame (22). The pouring nozzle (20) comprises a tube section (26) which is composed throughout of a predetermined refractory material and, at the underside of the sliding gate plate (16), is separated from the flange (28) surrounded by the steel frame (22). <IMAGE>

Description

Die Erfindung betrifft einen Schieberverschluß zum Öffnen und schließen des Auslaufkanals eines Gießgefäßes für metallische Schmelzen gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a slide closure for opening and closing the outlet channel of a casting vessel for metallic melts according to the preamble of claim 1.

Ein derartiger Schieberverschluß ist aus der FR-A-24 79 721 bekannt. Bei dieser bekannten Konstruktion ist der Rohrabschnitt des Ausgußstutzens an der Unterseite der Schieberplatte angesetzt; d. h. Rohrabschnitt und Schieberplatte sind zwei voneinander getrennte Bauteile.Such a slide closure is known from FR-A-24 79 721. In this known construction, the pipe section of the pouring spout is attached to the underside of the slide plate; d. H. Pipe section and slide plate are two separate components.

Weiter wurde ein Schieberverschluß vorgeschlagen, wie er in Fig. 1, linke Hälfte, dargestellt ist. Dieser Schieberverschluß umfaßt eine am Boden eines Gießgefäßes für metallische Schmelzen angeordnete Kopfplatte und eine relativ dazu verschiebbare Schieberplatte. An der Unterseite der Schieberplatte ist ein Ausgußstutzen angeformt. Der Ausgußstutzen umfaßt einen Rohrabschnitt, der einstückig mit dem Flansch ausgebildet ist. Im Rohrabschnitt ist ein Durchgang vorgesehen, durch den hindurch die metallische Schmelze im geöffneten Zustand des Schieberverschlußes austreten kann.Furthermore, a slide closure was proposed, as shown in Fig. 1, left half. This slide closure comprises a head plate arranged at the bottom of a casting vessel for metallic melts and a slide plate which can be displaced relative thereto. A pouring spout is formed on the underside of the slide plate. The pouring spout comprises a tube section which is formed in one piece with the flange. A passage is provided in the tube section, through which the metallic melt can emerge when the slide closure is open.

Der Flansch und der Rohrabschnitt bestehen aus unterschiedlichem mörtelhaltigem Material, wobei im Übergangsbereich beider Materialien eine Vermischung derselben auftritt. Diese bei der Herstellung des Ausgußstutzens entstehende Vermischung wird als "Spinellbildung" bezeichnet.The flange and the pipe section consist of different mortar-containing material, with a mixing of the same occurring in the transition area of the two materials. This mixture that occurs during the production of the pouring spout is referred to as "spinel formation".

Eine "Spinellbildung" ist nachteilhaft, da bei unterschiedlichen Ausdehnungskoeffizienten der verwendeten Materialien Zufalls-Rißbildungen auftreten, die die Funktionsfähigkeit des Ausgußstutzens erheblich beeinträchtigen können. Ferner wird dadurch die Lebensdauer des Schieberverschlußes vermindert."Spinel formation" is disadvantageous because, with different expansion coefficients of the materials used, random crack formation occurs, which can significantly impair the functionality of the pouring spout. Furthermore, the life of the slide closure is reduced.

Wird für den Flansch und den Rohrabschnitt der gleiche Mörtel verwendet, so ist die Korngröße der im Mörtel enthaltenen körnigen Bestandteile dadurch begrenzt, daß der Mörtel auch einen Spalt ausfüllen soll, der zwischen einem den Flansch einfassenden Stahlrahmen und der Schieberplatte ausgebildet ist. Die Auswahl bzw. Beschaffenheit der Materialien für den Ausgußstutzen bzw. den Rohrabschnitt wird dadurch unnötig eingeschränkt. Ferner wird bei der Verwendung einer einzigen Art von Mörtel für Flansch und Rohrabschnitt eine unnötig große Quantität teuerer Gießmasse benötigt, deren Qualität durch diejenige für den einem besonders hohen Verschleiß ausgesetzten Rohrabschnitt bestimmt ist.If the same mortar is used for the flange and the pipe section, the grain size of the granular constituents contained in the mortar is limited by the fact that the mortar should also fill a gap which is formed between a steel frame surrounding the flange and the slide plate. This unnecessarily restricts the selection or nature of the materials for the pouring spout or the pipe section. Furthermore, when using a single type of mortar for the flange and pipe section, an unnecessarily large quantity of expensive casting compound is required, the quality of which is determined by that for the pipe section which is subject to particularly high wear.

Aufgabe der vorliegenden Erfindung ist es, den eingangs genannten Schieberverschluß derart weiterzubilden, daß die Funktionssicherheit bei kostengünstiger Herstellung über eine lange Gebrauchszeit gewährleistet ist.The object of the present invention is to further develop the slide closure mentioned at the outset in such a way that the functional reliability is ensured over a long period of use with inexpensive manufacture.

Diese Aufgabe wird durch die im kennzeichnenden Teil des Patentanspruches 1 genannten Merkmale gelöst.This object is achieved by the features mentioned in the characterizing part of patent claim 1.

Dementsprechend ist der erfindungsgemäße Schieberverschluß dadurch gekennzeichnet, daß der Rohrabschnitt ebenso wie der Flansch an der Unterseite der Schieberplatte angeformt ist, und daß der Rohrabschnitt einen Stahlmantel aufweist, der sich durch den Stahlrahmen des Flansches hindurch bis an die Unterseite der Schieberplatte erstreckt.Accordingly, the slide closure according to the invention is characterized in that the tube section, like the flange, is formed on the underside of the slide plate, and that the pipe section has a steel jacket which extends through the steel frame of the flange to the underside of the slide plate.

Durch die letztgenannte Maßnahme ist sichergestellt, daß der Stahlmantel sich an der Unterseite der Schieberplatte regelrecht abstützt. Dadurch erhält der Rohrabschnitt über den Stahlmantel eine zusätzliche Abstützung an der Schieberplatte. Durch diese zusätzliche Abstützung können auf den Rohrabschnitt einwirkende Querkräfte abgefangen werden. Diese Querkräfte werden nicht auf den Flansch übertragen, so daß Rißbildungen im Bereich zwischen Flansch und Rohrabschnitt nicht zu befürchten sind. Demnach können für den Flansch und Rohrabschnitt auch unterschiedliche Materialien verwendet werden. Durch die Separierung von Rohrabschnitt einerseits und Flansch andererseits sind Zufallsrißbildungen zwischen diesen beiden Bereichen nicht mehr zu befürchten. Beispielsweise kann für den Flansch, der zur Einbettung der Schieberplatte sowie zur Abstützung derselben gegenüber thermodynamischen Federelementen dient, ein Material verwendet werden, das eine starke Bindung zur Schieberplatte eingeht und mechanisch hoch belastbar ist. Demgegenüber soll der Rohrabschnitt des Ausgußstutzens für einen direkten Kontakt mit der metallischen Schmelze geeignet sein und möglichst gut isolieren. Die teure Gießmasse, die den Ausgußkanal im Ausgußstutzen umgibt, wird lediglich für den Rohrabschnitt verwendet. Für den Flansch kann auf günstigeres Material zurückgegriffen werden.The latter measure ensures that the steel jacket is supported on the underside of the slide plate. This provides the pipe section with additional support on the slide plate via the steel jacket. This additional support can absorb transverse forces acting on the pipe section. These transverse forces are not transmitted to the flange, so that there is no fear of cracking in the area between the flange and the pipe section. Accordingly, different materials can also be used for the flange and pipe section. The separation of the pipe section on the one hand and the flange on the other hand means that there is no longer any risk of accidental crack formation between these two areas. For example, a material can be used for the flange, which is used to embed the slide plate and to support the slide plate against thermodynamic spring elements, which materially binds to the slide plate and is mechanically highly resilient. In contrast, the pipe section of the pouring spout should be suitable for direct contact with the metallic melt and insulate as well as possible. The expensive casting compound that surrounds the pouring spout in the pouring spout is only used for the pipe section. Less expensive material can be used for the flange.

Mit der erfindungsgemäßen Konstruktion ist darüberhinaus eine einfache und schnelle Konfektionierung des Ausgußstutzens bzw. des Schieberverschlußes möglich. Insgesamt gewährleistet die erfindungsgemäße Ausbildung die kostengünstige Herstellung eines funktionssicheren Schieberverschlußes mit langer Lebensdauer.With the construction according to the invention, a simple and quick assembly of the pouring spout or the slide closure is also possible. Overall, the design according to the invention ensures the cost-effective production of a functionally reliable slide closure with a long service life.

Vorteilhafte Details der Erfindung sind in den Unteransprüchen beschrieben.Advantageous details of the invention are described in the subclaims.

Nachstehend wird eine Ausführungsform eines erfindungsgemäßen Schieberverschlußes anhand der beigefügten Zeichnung näher erläutert. Diese zeigt in

Fig. 1
- linke Hälfte - eine Längsschnittdarstellung eines Schieberverschlußes nach dem Stand der Technik, und
- rechte Hälfte - eine Längsschnittdarstellung einer Ausführungsform eines Schieberverschlußes gemäß der Erfindung;
Fig. 2
eine vergrößerte Detailschnittansicht der in Figur 1, rechte Hälfte, dargestellten Schieberplatte mit Ausgußstutzen.
An embodiment of a slide closure according to the invention is explained in more detail with reference to the accompanying drawing. This shows in
Fig. 1
- Left half - a longitudinal sectional view of a slide closure according to the prior art, and
- Right half - a longitudinal sectional view of an embodiment of a slide closure according to the invention;
Fig. 2
an enlarged detail sectional view of the slide plate shown in Figure 1, right half with pouring spout.

Figur 1 zeigt die Längsschnitte von zwei Ausführungsformen eines Schieberverschlusses. In der linken Hälfte der Figur 1 ist ein Schieberverschluß nach dem Stand der Technik und in der rechten Hälfte ein Ausführungsbeispiel eines Schieberverschlusses gemäß der Erfindung abgebildet.Figure 1 shows the longitudinal sections of two embodiments of a slide closure. In the left half of FIG. 1, a slide closure according to the prior art is shown and in the right half an embodiment of a slide closure according to the invention.

Der Schieberverschluß ist am Boden eines nicht dargestellten Gießgefäßes für metallische Schmelzen angeordnet und dient zum Öffnen und Schließen eines Auslaufkanals. Er umfaßt eine Kopfplatte 12, die direkt am Boden des (nicht dargestellten) Gießgefäßes angeordnet ist, und eine darunter vorgesehene Schieberplatte 16. An deren Unterseite wiederum ist ein Ausgußstutzen 20 angeformt.The slide closure is arranged on the bottom of a casting vessel, not shown, for metallic melts and is used to open and close an outlet channel. It comprises a head plate 12, which is arranged directly on the bottom of the casting vessel (not shown), and a slide plate 16 provided underneath it, on the underside of which a pouring spout 20 is formed.

Die Schieberplatte 16 ist in bekannter Weise relativ zur Kopfplatte 12 verschiebbar angeordnet. In der Schließstellung ist ein in der Schieberplatte 16 ausgebildeter Durchlaß 18 zu einem entsprechend großen Durchlaß 14 in der Kopfplatte 12 versetzt. In der vollständigen Offenstellung fluchten beide Durchlässe 14, 18 miteinander, so daß die metallische Schmelze aus dem Gießgefäß ausfließen kann. In der Regel ist der Schieberplatte 16 ein hydraulischer Antrieb zugeordnet, der hier nicht näher erläutert zu werden braucht, da es sich um bekannte Maßnahmen handelt.The slide plate 16 is arranged in a known manner relative to the head plate 12. In the closed position, a passage 18 formed in the slide plate 16 is offset from a correspondingly large passage 14 in the head plate 12. In the fully open position, the two passages 14, 18 are aligned with one another so that the metallic melt can flow out of the casting vessel. As a rule, the slide plate 16 is assigned a hydraulic drive, which need not be explained in detail here, since these are known measures.

Der Ausgußstutzen 20 ist - wie bereits oben ausgeführt - an der Unterseite der Schieberplatte 16 angeformt bzw. angegossen und umfaßt einen Ausflußkanal definierenden Rohrabschnitt 26 und einen sich über die Unterseite der Schieberplatte 16 und die seitlichen Ränder derselben erstreckenden Flansch 28.The pouring spout 20 is - as already stated above - molded or cast onto the underside of the slide plate 16 and comprises a tube section 26 defining an outflow channel and a flange 28 extending over the underside of the slide plate 16 and the lateral edges thereof.

Der durch den Rohrabschnitt 26 definierte Ausgußkanal verlängert den in der Schieberplatte 16 ausgebildeten Durchlaß 18 und erstreckt sich von der Schieberplatte 16 durchgehend nach unten bis zum unteren Ende des Ausgußstutzens 20. Er besteht aus einem feuerfesten Material, beispielsweise aus einer Al2O3-haltigen Gießmasse, die von einem Stahlmantel 24 umgeben ist. Der Stahlmantel 24 stützt sich mit einem Ende an der Schieberplatte 16 ab und erstreckt sich ebenfalls bis nahe zum unteren Ende des Ausgußstutzens 20. Am unteren Ende weist der Stahlmantel 24 und dementsprechend auch der Ausgußstutzen 20 einen sich konisch verjüngenden Endabschnitt auf, der in eine korrespondierende Öffnung eines darunter angeordneten Schattenrohres 34 mit zugeordnetem Manipulator 36 dichtend einführbar ist.The pouring channel defined by the pipe section 26 extends the one formed in the slide plate 16 Passage 18 and extends continuously from the slide plate 16 down to the lower end of the pouring spout 20. It consists of a refractory material, for example an Al 2 O 3 -containing casting compound, which is surrounded by a steel jacket 24. The steel jacket 24 is supported at one end on the slide plate 16 and also extends to close to the lower end of the pouring spout 20. At the lower end, the steel jacket 24 and, accordingly, also the pouring spout 20 has a conically tapering end section, which in a corresponding Opening of a shadow tube 34 arranged below it with an associated manipulator 36 can be inserted in a sealing manner.

Der Flansch 28 umgibt an der Unterseite der Schieberplatte 16 den Rohrabschnitts 26 und ist von einem Stahlrahmen 22 eingefaßt, der wiederum den Stahlmantel 24 des Rohrabschnitts manschettenartig umgibt. Der Stahlrahmen 22 erstreckt sich im Abstand von der Unterseite der Schieberplatte 16 vom Rohrabschnitt 26 ausgehend radial nach außen und ist am radial äußeren Ende nach oben gebogen (siehe Bezugsziffer 44 in den Fig. 1 und 2), so daß er die Schieberplatte 16 zumindest zum Teil auch seitlich einfaßt. Zwischen der Schieberplatte 16 und dem nach oben gebogenen Rand des Stahlrahmens 22 ist ein schmaler Spalt 40 definiert. An der in Fig. 2 mit der Bezugsziffer 46 gekennzeichneten Position, bei welcher der Stahlmantel 24 an den Stahlrahmen 22 angrenzt, sind beide Elemente durch eine Heftschweißung miteinander fixiert.The flange 28 surrounds the tube section 26 on the underside of the slide plate 16 and is surrounded by a steel frame 22, which in turn surrounds the steel jacket 24 of the tube section in the manner of a sleeve. The steel frame 22 extends at a distance from the underside of the slide plate 16 starting from the pipe section 26 radially outwards and is bent upwards at the radially outer end (see reference number 44 in FIGS. 1 and 2), so that it at least for the slide plate 16 Part also borders on the side. A narrow gap 40 is defined between the slide plate 16 and the upwardly bent edge of the steel frame 22. At the position identified by reference numeral 46 in FIG. 2, in which the steel jacket 24 adjoins the steel frame 22, the two elements are fixed to one another by a tack weld.

Zwischen dem oberen Teil des zum Rohrabschnitt 26 gehörigen Stahlmantels 24, dem Stahlrahmen 22, der Unterseite und den seitlichen Rändern der Schieberplatte 16 ist dementsprechend für die Herstellung des Ausgußstutzens 20 ein Hohlraum ausgebildet, in den die Flanschmasse eingefüllt wird. Als Material für den Flansch kann beispielsweise ein Al203-haltiger Mörtel verwendet werden.Between the upper part of the steel jacket 24 belonging to the pipe section 26, the steel frame 22, the underside and the lateral edges of the slide plate 16, a cavity is accordingly formed for the production of the pouring spout 20, into which the flange mass is filled. For example, a mortar containing Al 2 0 3 can be used as the material for the flange.

Es ist darauf zu achten, daß die körnigen Bestandteile des Materials für den Flansch 28 eine Korngröße aufweisen, die etwas geringer ist als die minimale Breite des Spaltes 40 zwischen den seitlichen Rändern der Schieberplatte 16 und dem nach oben gebogenen Rand 44 des Stahlrahmens 22. Dadurch kann das Flanschmaterial in den Spalt 40 eindringen und diesen ausfüllen. Damit ist eine dauerhaft feste Verbindung zwischen Flansch 28 bzw. Ausgußstutzen 20 und Schieberplatte 16 geschaffen, die auch den hohen mechanischen Kräften standhält, welche durch die bereits erwähnten Federelemente 30 zwischen Flansch 28 und einem Stützrahmen 32 ausgeübt werden.Care must be taken that the granular components of the material for the flange 28 have a grain size which is slightly smaller than the minimum width of the gap 40 between the lateral edges of the slide plate 16 and the upwardly bent edge 44 of the steel frame 22 the flange material can penetrate into the gap 40 and fill it. This creates a permanently firm connection between flange 28 or pouring spout 20 and slide plate 16, which also withstands the high mechanical forces which are exerted by flange spring 30 already mentioned between flange 28 and a support frame 32.

Die Federelemente 30 pressen über den Flansch 28 die Schieberplatte 16 in dichte Anlage an die Kopfplatte 12. Dadurch wird verhindert, daß zwischen Schieber- und Kopfplatte metallische Schmelze nach außen oder Luft nach innen in den Auslaufkanal dringen kann.The spring elements 30 press the slide plate 16 tightly against the head plate 12 via the flange 28. This prevents metallic melt between the slide and head plate from penetrating outside or air inside into the outlet channel.

Als Federelemente 30 dienen vorzugsweise sog. "thermodynamische Elemente" (TDE), deren Federkraft mit steigender Temperatur zunimmt, und umgekehrt.So-called “thermodynamic elements” (TDE), whose spring force increases with increasing temperature, are preferably used as spring elements 30, and vice versa.

Beim Stand der Technik gehen die Materialien des den Auslaufkanal definierenden rohrartigen Fortsatzes bzw. Rohrabschnitts und des Flansches ineinander über bzw. sind im Übergangsbereich miteinander vermischt. Wegen der unterschiedlichen thermischen Ausdehnungskoeffizienten kann es dann beim Betrieb des Schieberverschlusses zu einer unkontrollierten Rißbildung in diesem kritischen Materialbereich kommen (siehe Bezugsziffer 38 in Fig. 1), so daß die Funktionsfähigkeit des Schieberverschlusses 10 nicht gewährleistet werden kann.In the prior art, the materials of the tubular extension or tube section defining the outlet channel and of the flange merge into one another or are mixed with one another in the transition region. Because of the different coefficients of thermal expansion, uncontrolled cracking can then occur in this critical material area during operation of the slide closure (see reference number 38 in FIG. 1), so that the functionality of the slide closure 10 cannot be guaranteed.

Beim vorliegenden Ausführungsbeispiel kann das Material für den Rohrabschnitt 26 unabhängig vom Material für den Flansch 28 gewählt werden. Beide Materialien sind im Bereich des Flansches 28 durch den oberen Ringabschnitt 42 des den Rohrabschnitt 26 umgebenden Stahlmantels voneinander getrennt. Durch die definierte Abgrenzung beider Materialien ist eine Art Sollbruchstelle oder Dehnfuge zwischen Flansch 28 und Rohrabschnitt 26 geschaffen. Eine Zufallsrißbildung im Ausgußstutzen 20 beim Betrieb des Schieberverschlusses ist daher nicht zu befürchten.In the present exemplary embodiment, the material for the tube section 26 can be selected independently of the material for the flange 28. Both materials are in the region of the flange 28 through the upper ring portion 42 of the Pipe section 26 surrounding steel jacket separated from each other. The defined delimitation of both materials creates a type of predetermined breaking point or expansion joint between flange 28 and pipe section 26. A random crack formation in the pouring spout 20 during operation of the slide closure is therefore not to be feared.

Für den Rohrabschnitt 26 kann ein Mörtel mit einem körnigen Bestandteil gewählt werden, dessen Korngröße größer ist als die Korngröße der körnigen Bestandteile des Materials für den Flansch 28. Als feuerfeste Materialien können Al2O3-, MgO- oder dergleichen Gießmassen verwendet werden.A mortar with a granular component whose grain size is larger than the grain size of the granular components of the material for the flange 28 can be selected for the pipe section 26. Al 2 O 3 , MgO or similar casting compounds can be used as refractory materials.

Ferner kann die Menge von teurerem Gießmaterial reduziert werden, da solches lediglich für den Rohrabschnitt 26 verwendet werden muß. Dies ermöglicht eine nicht unbeträchtliche Kostenreduktion bei der Herstellung des Schieberverschlusses.Furthermore, the amount of more expensive casting material can be reduced, since it only has to be used for the pipe section 26. This enables a not inconsiderable cost reduction in the manufacture of the slide closure.

Dadurch, daß sich der den Rohrabschnitt 26 umgebende Stahlmantel 24 am schieberplattenseitigen Ende an der Schieberplatte 16 abstützt, ist es möglich, eventuell auf den Ausgußstutzen 20 einwirkende Querkräfte abzufangen. Im Normalfall bewegen sich Schieberplatte 16 und Schattenrohr 34 gleichermaßen. Wirken auf das Schattenrohr 34 jedoch Querkräfte ein, wird normalerweise der Ausgußstutzen 20 "verbogen", wodurch Risse in der Gießmasse unterhalb der Schieberplatte 16 entstehen können. Durch die erwähnte Abstützung des Rohrabschnitts 26 über den Stahlmantel 24 an der Schieberplatte 16 werden diese Querkräfte jedoch abgefangen, d.h. nicht auf den Flansch 28 übertragen, so daß Rißbildungen im Bereich zwischen Flansch und Rohrabschnitt nicht zu befürchten sind. Der Stahlmantel 24 des Rohrabschnitts 26 verhindert auch wirksam ein Verbiegen desselben, so daß auch in diesem Bereich keine durch Querkräfte bedingte Risse auftreten können.Because the steel jacket 24 surrounding the pipe section 26 is supported on the slide plate end at the slide plate end 16, it is possible to absorb any transverse forces acting on the pouring spout 20. In the normal case, slide plate 16 and shadow tube 34 move in the same way. However, if transverse forces act on the shadow tube 34, the pouring spout 20 is normally “bent”, as a result of which cracks can occur in the casting compound below the slide plate 16. However, due to the aforementioned support of the pipe section 26 via the steel jacket 24 on the slide plate 16, these transverse forces are absorbed, ie not transferred to the flange 28, so that there is no fear of cracks forming in the area between the flange and the pipe section. The steel jacket 24 of the tube section 26 also effectively prevents the same from bending, so that no cracks caused by transverse forces can occur in this area either.

Schließlich sind mit der vorgenannten Konstruktion auch ein einfaches Aufspannen und kürzere Rüttelzeiten bei der Herstellung möglich. Darüber hinaus wird eine gezielte Schleifzugabe durch den Anschlag des Stahlmantels 24 ermöglicht.Finally, with the aforementioned construction, simple clamping and shorter vibration times during production are also possible. In addition, a targeted grinding allowance is made possible by the stop of the steel jacket 24.

Insgesamt ist durch die vorbeschriebene Konstruktion eine Möglichkeit für eine kostengünstige Herstellung eines funktionssicheren Schieberverschlusses mit einer langen Lebensdauer gezeigt.Overall, the construction described above shows one possibility for the cost-effective production of a functionally reliable slide closure with a long service life.

BezugszeichenlisteReference list

1010th
SchieberverschlußSlide closure
1212th
KopfplatteHeadstock
1212th
Durchlaß der KopfplattePassage of the head plate
1616
SchieberplatteSlide plate
1818th
SchieberplattendurchlaßGate opening
2020th
AusgußstutzenPouring spout
2222
StahlrahmenSteel frame
2424th
StahlmantelSteel jacket
2626
RohrabschnittPipe section
2828
Flanschflange
3030th
Federeinrichtung (TDE)Spring device (TDE)
3232
AbstützrahmenSupport frame
3434
SchattenrohrShadow pipe
3636
Manipulatormanipulator
3838
RißCrack
4040
Spaltgap
4242
RingabschnittRing section
4444
UmfangsrandPeripheral edge
4646
HeftschweißungTack welding

Claims (5)

  1. Gate closure for opening and closing the delivery channel of a pouring vessel for metallic melts, having a gate plate (16), which can be displaced in relation to a top plate (12) arranged on the bottom of the pouring vessel and on the underside of which a pouring-out nozzle (20) is arranged, which nozzle comprises a tube portion (26), consisting of predetermined refractory material throughout, and also a flange (28), which extends over the underside and at least part of the lateral edge of the gate plate (16), is enclosed by a steel frame (22) and is separated on the underside of the gate plate (16) with respect to the tube portion (26), characterized in that the tube portion (26), as well as the flange (28), is integrally formed on the underside of the gate plate (16) and has a steel casing (24), which extends through the steel frame (22) of the flange (28) as far as the underside of the gate plate (16).
  2. Gate closure according to Claim 1, characterized in that the flange (28) consists of a material which is different from the refractory material of the tube portion (26).
  3. Gate closure according to Claim 2, characterized in that the flange material is a mortar, the granular constituents of which have a grain size which is slightly smaller than the minimum width of a gap (40) between the lateral edges of the gate plate (16) and the peripheral edge (44) of the steel frame (22) enclosing the flange (28).
  4. Gate plate closure according to Claim 3, characterized in that a mortar containing Al2O3 serves as the flange material.
  5. Gate plate closure according to one of Claims 1 - 4, characterized in that an Al2O3, MgO or similar casting composition serves as the refractory material for the tube portion (26) of the pouring-out nozzle (20).
EP94120342A 1993-12-21 1994-12-21 Sliding gate closure Expired - Lifetime EP0659506B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4343751A DE4343751A1 (en) 1993-12-21 1993-12-21 Slide closure
DE4343751 1993-12-21

Publications (2)

Publication Number Publication Date
EP0659506A1 EP0659506A1 (en) 1995-06-28
EP0659506B1 true EP0659506B1 (en) 1997-10-22

Family

ID=6505713

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94120342A Expired - Lifetime EP0659506B1 (en) 1993-12-21 1994-12-21 Sliding gate closure

Country Status (4)

Country Link
EP (1) EP0659506B1 (en)
AT (1) ATE159439T1 (en)
DE (2) DE4343751A1 (en)
ES (1) ES2110686T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19606686A1 (en) * 1996-02-22 1997-08-28 Zimmermann & Jansen Gmbh Slider closure for opening and closing the outlet channel of a casting vessel for metallic melts
BE1013024A3 (en) * 1998-12-15 2001-08-07 Internat Ind Engineering S A Casting tube

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841539A (en) * 1973-03-01 1974-10-15 United States Steel Corp Collector nozzle for slidable gates
BE820994A (en) * 1973-10-12 1975-04-11 METAL-CASTING PERFECTIONS
GB1492533A (en) * 1973-11-23 1977-11-23 Flogates Ltd Pouring of metals
GB1490982A (en) * 1974-01-16 1977-11-09 Flogates Ltd Pouring of molten metals
GB1590775A (en) * 1977-02-17 1981-06-10 Flogates Ltd Sliding gate valves
DE2924118C2 (en) * 1979-06-15 1983-03-31 Zimmermann & Jansen GmbH, 5160 Düren Slide gate for a ladle
DE8009335U1 (en) * 1980-04-03 1980-07-24 Zimmermann & Jansen Gmbh, 5160 Dueren SLIDE ELEMENT FOR THE SLIDING CLOSURE OF A WATER PAN
GB2117498B (en) * 1982-04-01 1985-07-17 Flogates Ltd Sliding gate valves
GB8507277D0 (en) * 1985-03-20 1985-04-24 British Steel Corp Refractory component
DE8528085U1 (en) * 1985-10-02 1987-02-05 Dahlhoff, Friedrich-Wilhelm, 5804 Herdecke Slide valve for pouring out containers containing molten metal

Also Published As

Publication number Publication date
ES2110686T3 (en) 1998-02-16
DE4343751A1 (en) 1995-06-22
EP0659506A1 (en) 1995-06-28
DE59404422D1 (en) 1997-11-27
ATE159439T1 (en) 1997-11-15

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